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MAX8973A - Three-Phase Step-Down Switching Regulator

General Description

The MAX8973A high-efficiency, three-phase, DC-DC step-down switching regulator delivers up to 9A of output current in a compact footprint with excellent transient response.

Each phase operates at a 2MHz fixed frequency, allowing the use of small magnetic components.

Key Features

  • include internal soft-start control circuitry to reduce inrush current, guaranteed monotonic voltage adjustment, over-current protection, and over-temperature protection. The MAX8973A operates over the -40°C to +85°C extended temperature range and is packaged in an ultra-small WLP package. Features.
  • Up to 9A Output Current.
  • > 91% Peak Efficiency at 3.6VIN, 1.2VOUT.
  • Rotational Phase Spreading Maximizes Efficiency at Light Loads.
  • Initial Accuracy of 0.5% at 1.2V Output.

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MAX8973A EVALUATION KIT AVAILABLE 9A, Three-Phase Step-Down Switching Regulator General Description The MAX8973A high-efficiency, three-phase, DC-DC step-down switching regulator delivers up to 9A of output current in a compact footprint with excellent transient response. Each phase operates at a 2MHz fixed frequency, allowing the use of small magnetic components. Maxim Integrated’s proprietary Rotational Phase Spreading algorithm optimizes efficiency at low output currents. Software-selectable forced-PWM mode allows either fixed-frequency operation, or improved efficiency at light load with a variable frequency in skip mode. The tripleinductor architecture reduces the size of the external components while providing the benefit of ripple current cancellation.